5-7
P7150EA
2. Face the unit to the East and Degauss the CRT
using Degaussing Coil.
3. Input the Monoscope Pattern.
4. Adjust the Focus Control on the FBT to obtain
clear picture.
The following adjustments normally are not
attempted in the field. Only when replacing the
CRT then adjust as a preparation.
17. Purity Adjustment
Purpose:
To obtain pure color.
Symptom of Misadjustment:
If Color Purity
Adjustment is incorrect, large areas of color may not
be properly displayed.
1. Set the unit facing east.
2. Operate the unit for over 30 minutes before
adjusting.
3. Fully degauss the unit using an external
degaussing coil.
4. Loosen the screw on the Deflection Yoke Clamper
and pull the Deflection Yoke back away from the
screen. (See Fig. 7)
5. Loosen the Ring Lock and adjust the Purity
Magnets so that a red field is obtained at the
center of the screen. Tighten Ring Lock. (See Fig.
6,7)
6. Slowly push the Deflection Yoke toward the bell of
CRT and set it where a uniform red field is
obtained.
7. Tighten the clamp screw on the Deflection Yoke.
18. Convergence Adjustment
Purpose:
To obtain proper convergence of red, green
and blue beams.
Symptom of Misadjustment:
If Convergence
Adjustment is incorrect, the edge of white letters may
have color edges.
1. Loosen the Ring Lock and align red with blue dots
or Crosshatch at the center of the screen by
rotating (RB) C.P. Magnets. (See Fig. 8)
2. Align red / blue with green dots at the center of the
screen by rotating (RB-G) C.P. Magnet. (See Fig.
9)
3. Paintlock the C.P. Magnets after adjustment.
Test Point
Adj. Point
Mode
Input
---
Deflection Yoke
Purity Magnet
---
Red Color
Tape
M. EQ.
Spec.
---
Pattern
Generator
See below
Figure
Fig. 6
GREEN
RED
BLUE
Test Point
Adj. Point
Mode
Input
---
C.P. Magnet (RB)
C.P. Magnet (RB-G)
Deflection Yoke
---
Dot Pattern
or
Crosshatch
Tape
M. EQ.
Spec.
---
Pattern Generator
See below
Figure
Fig. 7
Fig. 8
Fig. 9
DY WEDGE
DEFLECTION YOKE
C.P. MAGNET
RING LOCK
SCREW
SCREW
RB-G
RB
PURITY
CRT
COIL
COIL CLAMPER
C.P. MAGNET CLAMPER
B
G
R
R
G
B
C.P. MAGNET (RB)
RB
G
RB
G
C.B. MAGNET (RB-G)
Summary of Contents for CR202EM8
Page 33: ...8 3 Main 1 4 Schematic Diagram P7151SCM1 ...
Page 34: ...8 4 P7151SCM2 Main 2 4 Schematic Diagram ...
Page 35: ...8 5 Main 3 4 CRT Schematic Diagram P7151SCM3 ...
Page 37: ...8 7 DTV Module 1 2 Schematic Diagram P7151SCD1 ...
Page 48: ...12 2 P7151PEX Packing S4 S1 Tape X1 X3 FRONT X2 S2 S3 S6 Packing tape Packing tape S7 ...
